
jQuery.extend({

/**

* Returns get parameters.

*

* If the desired param does not exist, null will be returned

*

* @example value = $.getURLParam("paramName");

*/ 

 getURLParam: function(strParamName){

	  var strReturn = "";

	  var strHref = window.location.href;

	  var bFound=false;

	  

	  var cmpstring = strParamName + "=";

	  var cmplen = cmpstring.length;


	  if ( strHref.indexOf("?") > -1 ){

	    var strQueryString = strHref.substr(strHref.indexOf("?")+1);

	    var aQueryString = strQueryString.split("&");

	    for ( var iParam = 0; iParam < aQueryString.length; iParam++ ){

	      if (aQueryString[iParam].substr(0,cmplen)==cmpstring){

	        var aParam = aQueryString[iParam].split("=");

	        strReturn = aParam[1];

	        bFound=true;

	        break;

	      }

	      

	    }

	  }

	  if (bFound==false) return null;

	  return strReturn;

	}

});
